Foreman, Velma M. 1974. Grammar of Yessan-Mayo. (Language Data: Asian-Pacific Series, 4.) Santa Ana: Summer Institute of Linguistics. iv+304pp.
@book{gForemanYessan,
author = {Foreman, Velma M.},
pages = {iv+304},
publisher = {Santa Ana: Summer Institute of Linguistics},
series = {Language Data: Asian-Pacific Series},
title = {Grammar of Yessan-Mayo},
volume = {4},
year = {1974}
}